Quote Originally Posted by Davo242 View Post
no gear box just a direct drive at the min for testing. its a 59 tooth sprocket on a mod1 rack. 4:1
What you mean 4:1 if it's direct drive there's no ratio.? 59T direct drive means 185mm pitch.!!!

Anyway I strongly advise you to STOP and have re-think because your wasting your time on several fronts.
#1 No way can you move gantry that wide with one motor.
#2 Ratio of at least 5:1 will be needed with that size pinion.
#3 The drives are rubbish and even with 36V if they survive long enough they will run so badly and rough you'll struggle even with 2. This is because resonance will cripple them and turn them into horrible stalling nightmares. These cheap nasty drives have no way of dealing with resonance and with machine being all steel and not exactly HD the motors/drives will be affected.
#4 Looking at the Z axis unless your going to use for just Plasma then No way is that Z axis going to be upto cutting anything but foam. Certainly won't cut wood very well.

So again please don't take this wrong way I say it for your own sake and your wallets sake. You'll be wasting good money and time if you continue as you are.!